I connected all the wires just like the manual said. But when the key is turned off the Rio is still powered. You can see the power light is still on. I tested all the wire with test light, so I know they were correct. My other head unit turns off when you turn the key to off, but the Rio does not. I have plenty of experience with car audio but this one is stumping me. there is only 2 power wires..how hard can that be?